This study examined how meanings of Korean polysemous verbs are processed in sentential context. Based on the previous studies, it was hypothesized that high frequency meaning would be activated immediately regardless of the context, whereas low frequency meaning would be immediately activated only when it is consistent with the context(assumption of dual effect of context). An experiment was performed, in which simple sentences that bias the verbs into either primary or secondary meaning were used as primes and nouns related to either meaning were used as targets. Participants' task was to decide whether the targets are real words or nonwords as accurately and rapidly as possible in addition to memorizing the sentences. Two independent variables were frequencies of each meaning of the polysemous verbs(high/low) and consistency between context and target words(consistency/inconsistency). 38 students participated in the experiment. The results showed that meanings of the verbs were processed faster when the sentential contexts fit in with those meanings regardless of their frequencies. That is, lexical decision responses of the targets were faster only when they were consistent with the context. Some consideration and future directions of this study were discussed